I just started playing this game a few days ago. I am able to browse the server list. The ping number looks fine. But I am not able to join any server. I always got "Server not responding" when I tried to connect in-game or through steam's server list. I can set up my own server, but then my friend was not able to connect in. The game keeps showing it is connecting.
I have already went through this troubleshooting list.
http://support.kleientertainment.com/customer/portal/articles/1813164
Additionally I have tried to set port forwarding for port 10998-11000, but I still got the same message. I found that the only way to connect to a server is through Logmein Hamachi. But that means I can only play with friends that have Hamachi installed.
Do anyone know how to fix this? I have look through the forum but could not find a solution work for me.